Geometry and measurement

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Across
  1. 2. number of square units inside of a polygon
  2. 4. triangle that has one angle measuring more than 90 degrees
  3. 5. distance around a shape
  4. 7. triangle that has 2 or more equal sides
Down
  1. 1. triangle that has NO equal sides
  2. 2. triangle that has all 3 angles measuring less than 90 degrees
  3. 3. triangle that has one 90 degree angle
  4. 6. triangle that has ALL equal sides